zdtm/cr_veth: use the --clean alias of the cleanup action
zdtm/cr_veth: use the --clean alias of the cleanup action

travis-ci: success for zdtm/cr_veth: use the --clean alias of the cleanup action
Signed-off-by: Andrei Vagin <74c05afa918858348d6db8037d82fa8124870113@virtuozzo.com>
Signed-off-by: Pavel Emelyanov <c9a32589e048e044184536f7ac71ef92fe82df3e@virtuozzo.com>

eabatalov/criu,eabatalov/criu,eabatalov/criu,eabatalov/criu,eabatalov/criu,eabatalov/criu